JPH07108301A - Continuous hot rolling equipment - Google Patents

Abstract

PURPOSE:To provide a continuous hot rolling equipment with which the increase of production capacity is realized without resulting in the remarkable increase of the cost of equipment and running cost and also a defective material to be rolled is rationally removed. CONSTITUTION:The material 6 to be rolled of a prescribed length is manufactured by properly cutting a cast slab 2 which is continuously cast with a continuous casting machine 1, its temp. is controlled by passing that material to be rolled through a heating furnace 7 and the material is rolled into a prescribed thickness with a rolling mill train 10 which is installed in the poststage of the heating furnace 7. Only one heating furnace 7 is installed and plural continuous casting machines are arranged side by side. And, a transporting device 20 is provided between each continuous casting machine and the heating furnace, the material to be rolled which is manufactured with each continuous casting machine is led to the heating furnace with this transporting device and, in the case of generating the defective material to be rolled, the defective material is led to a reject line RL with the transporting device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot continuous rolling facility for continuously performing casting to rolling of a material to be rolled.

[0002]

2. Description of the Related Art As shown in FIGS. 3 and 4, a hot continuous rolling facility has a long strip plate-shaped slab 2 continuously cast by a continuous casting machine 1 into roll groups 3 and 4. Is roughly shaped and continuously transferred horizontally, cut into a predetermined length by a pair of shears 5 provided above and below the pass line, and transferred to the heating furnace 7 as the material 6 to be rolled. Heating furnace 7
As the table, a long-sized table type having a roller table 8 capable of accommodating a large number of material 6 to be rolled and sequentially moving the material 6 to be rolled is generally used. Rolled material 6 while passing through furnace 7
Is controlled to a desired temperature by controlling the temperature by a heating means (not shown), and the material to be rolled 6 that has passed through the heating furnace 7 is put into a rolling mill train 10 including a plurality of rolling mills 9 (6 in the illustrated example). It is configured to be guided, sequentially rolled by the rolling mill train 10 to a desired plate thickness, cooled by a cooling device 11, and then wound into a winding device 12 in a roll shape.

[0003]

The hot continuous rolling facility as described above is excellent in productivity because it continuously performs casting and rolling of the slab 2, but in recent years, further production capacity has been achieved. Therefore, it is required to increase the casting speed of the slab 2 in the continuous casting machine 1 and the rolling mill train 1
At 0, the rolling speed of the material 6 to be rolled is increased. However, in the above-mentioned equipment, the rolling mill train 1
Although there is still room for further increasing the rolling speed at 0, the casting speed in the continuous casting machine 1 has already reached its limit and cannot keep up with the rolling speed, which further increases the production capacity. It is an obstacle to the above.

In addition, in the above-mentioned conventional equipment, it is inevitable that a defective rolled material 6 is generated, and the defective rolled material 6 is passed through the heating furnace 7 and then is rolled as it is. It is conventional in the past to pass the rows 10 and eliminate them without rolling. However, in that case, there is waste that unnecessary temperature control is performed in the heating furnace 7 even for defective products that are eliminated without being rolled, and an effective improvement measure from the viewpoint of energy saving. Was requested.

In order to increase the production capacity, hot continuous rolling equipment as shown in FIG. 5, for example, is also under study. This has two continuous casting machines 1 and two heating furnaces 7, respectively.
By arranging the bases side by side, and by installing the transfer device 13 for guiding the material 6 to be rolled to the rolling mill row 10 by laterally transferring the material 6 to be rolled to the rear stage of each heating furnace 7, 7, The casting capacity is substantially doubled. However, such a facility requires two large-scale heating furnaces 7 in particular, which causes a significant increase in facility cost and operating cost, which is not so realistic. Further, in this case, when a defective product is generated in the material 6 to be rolled, the defective product is laterally carried out by the transport device 13 so that it can be eliminated without being guided to the rolling mill train 10. However, even if you do so, the defective product will still be the heating furnace 7.
As described above, useless temperature control is performed because the temperature passes through.

The present invention has been made in view of the above circumstances, and an object of the present invention is to realize an increase in production capacity without causing a large increase in equipment costs and operating costs, and
An object of the present invention is to provide an effective hot continuous rolling facility capable of rationally removing defective rolled materials.

[0007]

DISCLOSURE OF THE INVENTION According to the present invention, a long strip plate-shaped slab continuously cast by a continuous casting machine is cut to produce a rolled material having a predetermined length, and the rolled material is A hot continuous rolling facility configured to perform temperature control by passing through a heating furnace, and to roll a material to be rolled by a rolling mill row installed at a subsequent stage of the heating furnace, wherein only one heating furnace is installed. Together with a plurality of continuous casting machines installed in parallel in the preceding stage of the heating furnace, for guiding the rolled material produced by each continuous casting machine to the heating furnace and guiding the defective rolled material to the exclusion line. It is characterized in that a transfer device is installed between each continuous casting machine and the heating furnace.

[0008]

In the facility of the present invention, a plurality of continuous casting machines are arranged in parallel in front of one heating furnace, and the material to be rolled produced by these continuous casting machines is introduced into the heating furnace by the conveying device. Further, when the material to be rolled manufactured by the continuous casting machine is defective, the defective product is guided to an exclusion line by a carrying device without being guided to the heating furnace and is eliminated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, but the same parts as those of the conventional equipment described above are designated by the same reference numerals and detailed description thereof will be omitted. As shown in these figures, the equipment of this embodiment is composed of one heating furnace 7
2 continuous casting machines 1 and 1 are installed in parallel in the preceding stage, and a conveying device 20 for guiding the rolled material 6 produced by the continuous casting machines 1 and 1 to the heating furnace 7 is provided in each continuous casting machine. It is installed between the machines 1 and 1 and the heating furnace 7.

That is, in this equipment, one continuous casting machine 1 is installed on the front side of the heating furnace 7 in the same manner as in the conventional case, and in addition to that, another continuous casting machine 1 is formed on the side thereof. The continuous casting machines 1 are arranged in parallel. Long strip plate-shaped slabs 2, which are respectively cast by both of the continuous casting machines 1, 1.
2 is cut by shears 5 to form rolled materials 6 having the same size and shape, and each rolled material 6 is sequentially charged into the heating furnace 7 by the conveying device 20. .

The transfer device 20 is constructed so that the table 21 on which the material 6 to be rolled can be placed is moved by the guide rails 22 in the width direction of the heating furnace 7.
Can enter the inside through the opening 7a formed in the side wall surface of the heating furnace 7, and the table 21 can be moved in the direction of retreating from the heating furnace 7 so that another continuous casting machine 1
It can be arranged at a position in front of, and can be arranged at a position of the reject line RL set on the side thereof. The reject line RL is a line for removing the rolled material 6 when it is defective without charging it into the heating furnace 7.

It should be noted that the table 21 in the above-mentioned transfer device 20 is continuous with the roller table 8 installed inside the heating furnace 7 when the table 21 is placed inside the heating furnace 7, and the material to be rolled is charged into the heating furnace 7. 6 can be transferred in the longitudinal direction of the heating furnace 7. Further, the opening 7a of the heating furnace 7 is provided with a door 7b which is opened when the table 21 is inserted.

In the above equipment, the rolled material 6 is manufactured by both of the two continuous casting machines 1 and 1, and the rolled material 6 is sequentially charged into the heating furnace 7 by the conveying device 20 as follows. To do. That is, when the material to be rolled 6 manufactured by one of the continuous casting machines 1 installed on the front side of the heating furnace 7 is charged into the heating furnace 7, the table 2 of the transfer device 20 is used.
1 is introduced into the heating furnace 7, the material 6 to be rolled is guided onto the table 21, and is transferred to the front of the heating furnace 7 as it is. Further, in order to load the material to be rolled 6 produced by the other continuous casting machine 1 into the heating furnace 7, as shown in FIG. 2, a table 21 is arranged at a position in front of the continuous casting machine 1 and placed there. The material 6 to be rolled is placed. Then, after the table 21 is moved to the heating furnace 7 side to enter the inside through the opening 7a, the material 6 to be rolled is transferred to the front of the heating furnace 7.

By doing so, in this equipment,
The casting capacity can be substantially doubled as compared with the conventional general equipment having only one continuous casting machine 1, and the production capacity of the entire equipment can be greatly increased. Further, since only one large-scale heating furnace 7 is installed as in the conventional case, the facility cost inevitable when installing a plurality of heating furnaces 7, 7 as shown in FIG. It is possible to avoid a large increase in operating costs.

If the material to be rolled 6 is defective, the defective product is guided to the reject line RL without being guided to the heating furnace 7 by the transporting device 20 and is eliminated as in the conventional case. There is no waste of managing the temperature of the defective product in the heating furnace 7, which is rational and energy saving can be achieved.

In the above embodiment, two continuous casting machines 1 are used.
However, if necessary, three or more continuous casting machines 1 may be installed. In that case, the rolled material 6 produced by each continuous casting machine 1 may be sequentially introduced into the heating furnace 7. In addition, the configuration of the carrier device 20 may be appropriately changed. Further, in the above-described embodiment, the heating furnace 7 of a so-called tunnel heating furnace provided with the roller table 8 is adopted, but an appropriate heating furnace such as a walking beam type heating furnace may be adopted. Furthermore, the specific configuration of the rolling mill train 10 in the latter stage of the heating furnace 7 is not limited to the above embodiment.

[0017]

As described above, according to the hot continuous rolling facility of the present invention, a plurality of continuous casting machines are installed in parallel in front of one heating furnace, and are manufactured by each continuous casting machine. Each of the continuous casting machines has a configuration in which a conveying device for guiding the rolled material to the heating furnace and guiding the defective rolling material to the exclusion line is installed between each continuous casting machine and the heating furnace. Not only can the casting capacity be increased by this, the production capacity of the entire equipment can be greatly increased, but since only one heating furnace is installed, it is possible to avoid a significant increase in equipment costs and operating costs. The excellent effect that energy saving can be achieved by eliminating the waste of managing the temperature of the defective product to be eliminated by introducing the defective rolled material to the elimination line by the conveying device by using the heating furnace.

[Brief description of drawings]

FIG. 1 is an elevational view showing an outline of a hot continuous rolling facility which is an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an elevation view showing an outline of a conventional general hot continuous rolling facility.

FIG. 4 is a plan view of the same.

FIG. 5 is a plan view showing another example of hot continuous rolling equipment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous casting machine 2 Cast piece 6 Rolled material 7 Heating furnace 10 Rolling machine row 20 Conveying device RL Reject line (exclusion line).

Claims (1)

[Claims] 1. A strip-shaped slab continuously cast by a continuous casting machine is cut to produce a material to be rolled having a predetermined length,
A hot continuous rolling facility configured to perform temperature control by passing the rolled material through a heating furnace and to roll the rolled material by a rolling mill train installed in a subsequent stage of the heating furnace, wherein the heating furnace is In addition to installing only one unit, a plurality of continuous casting machines are installed in parallel in the preceding stage of the heating furnace, and the rolled material produced by each continuous casting machine is introduced to the heating furnace and defective rolling material is eliminated. A hot continuous rolling facility, characterized in that a conveying device for guiding to a line is installed between each continuous casting machine and a heating furnace.